1152155643 has 4 divisors (see below), whose sum is σ = 1536207528. Its totient is φ = 768103760.

The previous prime is 1152155639. The next prime is 1152155657. The reversal of 1152155643 is 3465512511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1152155643 - 2² = 1152155639 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1152155663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192025938 + ... + 192025943.

It is an arithmetic number, because the mean of its divisors is an integer number (384051882).

Almost surely, 2^1152155643 is an apocalyptic number.

1152155643 is a deficient number, since it is larger than the sum of its proper divisors (384051885).

1152155643 is an equidigital number, since it uses as much as digits as its factorization.

1152155643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384051884.

The product of its digits is 18000, while the sum is 33.

The square root of 1152155643 is about 33943.4182574472. The cubic root of 1152155643 is about 1048.3437662118.

The spelling of 1152155643 in words is "one billion, one hundred fifty-two million, one hundred fifty-five thousand, six hundred forty-three".